Power Connection - Ev-1; Seatalkng® Power Connection Point; Power Distribution - Seatalkng - Raymarine EVOLUTION EV-1 Installation Instructions Manual

Power connection — EV-1
The power for the EV-1 unit is provided by the
SeaTalkng® backbone.
• The EV-1 unit must be connected to a spur
connection on the SeaTalkng® backbone.
• SeaTalkng® requires ONE 12 V dc power source.
This can be provided by:
– A battery
– An Evolution ACU–200, ACU-300 or ACU-400
providing power to the same SeaTalkng®
backbone.
If your vessel has a 24 V supply a suitable voltage
convertor is required.
Warning: Positive ground
systems
Do not connect this unit to a system which
has positive grounding.
SeaTalkng® power connection point
Small systems
If the backbone length is 60 m (197 ft) or less, the
power connection point may be connected at any
point in the backbone.
Large systems
If the backbone length is greater than 60 m (197 ft),
the power connection point should be connected at
a point that creates a balanced current draw from
each side of the backbone. The Load Equivalency
Number (LEN) is used to determine the power
connection point for the system.
In the example above the system has an overall LEN
of 10, so the optimum connection point would be to
have 5 LEN either side of the connection point.
In-line fuse and thermal breaker ratings
The SeaTalkng® network's power supply requires an
in-line fuse or thermal breaker to be fitted.
In-line fuse rating
5 A
Cables and connections
Thermal breaker rating
3 A (if only connecting one
device)
Note:
The suitable fuse rating for the thermal breaker
is dependent on the number of devices you are
connecting. If in doubt consult an authorized
Raymarine dealer.
SeaTalkng® system loading
The maximum loading / LEN for a SeaTalkng®
system depends on the length of the backbone.
Loading type Backbone length
Unbalanced 20 m (66 ft)
Unbalanced 40 m (131 ft)
Unbalanced 60 m (197 ft)
Balanced 60 m (197 ft) or
less
Balanced
80 m (262 ft)
Balanced 100 m (328 ft)
Balanced 120 m (394 ft)
Balanced 140 m to 160 m
(459 ft to 525 ft)
Balanced 180 m to 200 m
(591 ft to 656 ft)
Power distribution — SeaTalkng®
Recommendations and best practice.
• Only use approved SeaTalkng® power cables. Do
NOT use a power cable designed for, or supplied
with, a different product.
• See below for more information on implementation
for some common power distribution scenarios.
Important:
When planning and wiring, take into consideration
other products in your system, some of which (e.g.
sonar modules) may place large power demand
peaks on the vessel's electrical system.
Note:
The information provided below is for guidance
only, to help protect your product. It covers
common vessel power arrangements, but does
NOT cover every scenario. If you are unsure how
to provide the correct level of protection, please
consult an authorized Raymarine dealer or a
suitably qualified professional marine electrician.
Implementation — direct connection to battery
• SeaTalkng® power cables may be connected
directly to the vessel's battery, via a suitably rated
fuse or breaker.
• You MUST fit a suitably rated fuse or breaker
between the red wire and the battery's positive
terminal.
• Refer to the inline fuse ratings provided in the
product's documentation.
Total LEN
40
20
14
100
84
60
50
40
32
27